Fig. 5: Manipulation of internal pore size with crosslinking energy.
a Photo of OM microchannel made on cover glass. Variation of branch colour is accomplished by changing energy dosage according to the design as specified in Supplementary Fig. 10: the main channel adopted a high energy dosage while the side branch adopted a low energy dosage. b Microscope photo of the same OM microchannel in (a). c–e The corresponding zoom-in microscope photos, where the main channels (labelled as (1), energy dosage: 600 mJ/cm2) show a more reddish structural colour compared to the side branches (labelled as (2), energy dosage: 300 mJ/cm2). f An SEM image for the OM microchannel in (d). Red colour is added to highlight the channel. The original image is shown in Supplementary Fig. 12. g The zoom-in SEM cross-section for the main channel in (f). h The zoom-in SEM cross-section for the side branch in (f). Scale bar, (b), 200 μm, (c–e), 100 μm, (f), 50 μm, (g, h), 200 nm.
